The sum of first `n` terms of an AP is `(3n^2+6n)` Find the `n^(th)` term and `15^(th)` terms of the AP

The sum of the first n terms of an A.P. is 3n^2+6n . Find the n^(th) term of this A.P.

If the sum of first n terms of an A.P. is 3n^2 + 2n , find its r^(th) term.

The sum of first n terms of an AP is 4n^(2)+2n Find its n th term.

The sum of the first n terms of an A.P. is 3n^2+6n . Find the n t h term of this A.P.

If sum of n terms of an AP is 3n^2+n . Find its 10^(th) term.

(i) The sum of the first n terms of an AP is ((5n^(2))/(2) + (3n)/(2)) . Find the nth term and the 20th term of this AP. (ii) The sum of the first n terms of an AP is ((3n^(2))/(2) + (5n)/(2)). Find its nth term and the 25th term.

If the sum of first n terms of an A.P. is 3n^(2)-2n , then its 19th term is

If sum of n terms of an A.P. is 4n^(2) +7n , find the 15^(th) term.

If the sum of n terms of an A.P is 2n+3n^(2) , find the r^(th) term

The sum of n terms of an A.P is 3n^(2) +n . Then 8^(th) term of the A.P is